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[ADT] Move llvm::identity into IndexedMap (NFC) #164568

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Merged
merged 5 commits into from
Oct 23, 2025
Merged

[ADT] Move llvm::identity into IndexedMap (NFC) #164568

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1c04cee
[ADT] Modernize IndexedMap to use llvm::identity_cxx20 (NFC)
kazutakahirata Oct 20, 2025
8869a6e
[ADT] Modernize IndexedMap with llvm::identity_cxx20 (NFC)
kazutakahirata Oct 22, 2025
20e3379
[ADT] Move llvm::identity into IndexedMap (NFC)
kazutakahirata Oct 22, 2025
45959de
Merge branch 'main' into cleanup_20251021_ADT_IndexedMap_identity
kazutakahirata Oct 22, 2025
c8eeafb
Address a comment.
kazutakahirata Oct 22, 2025
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13 changes: 11 additions & 2 deletions llvm/include/llvm/ADT/IndexedMap.h
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Original file line number Diff line number Diff line change
Expand Up @@ -22,12 +22,21 @@

#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/identity.h"
#include <cassert>

namespace llvm {

template <typename T, typename ToIndexT = identity<unsigned>> class IndexedMap {
namespace detail {
template <class Ty> struct IdentityIndex {
using argument_type = Ty;

Ty &operator()(Ty &self) const { return self; }
const Ty &operator()(const Ty &self) const { return self; }
};
} // namespace detail

template <typename T, typename ToIndexT = detail::IdentityIndex<unsigned>>
class IndexedMap {
using IndexT = typename ToIndexT::argument_type;
// Prefer SmallVector with zero inline storage over std::vector. IndexedMaps
// can grow very large and SmallVector grows more efficiently as long as T
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31 changes: 0 additions & 31 deletions llvm/include/llvm/ADT/identity.h
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